Fetal exposure to cocaine, tobacco or marijuana is not associated with lower academic achievement in children, a new study suggests. However, fetal exposure to alcohol in children with no evidence of fetal alcohol syndrome does lead to lower scores in math reasoning and spelling at age 11.

U.S. veterans of the wars in Iraq and Afghanistan who have post-traumatic stress disorder and other psychiatric disorders are more likely than veterans without mental health issues to receive prescription opioids for pain, according to a new study.